Question

A 20 kg person climbs up a uniform ladder with negligible mass. The
upper end of the ladder rests on a frictionless wall. The bottom of
the ladder rests on a ?oor with a rough surface where the coe?cient
of static friction is 0.24 . The angle between the horizontal and
the ladder is 60?
When the person attempts to climb the ladder, how far up the ladder
will the person
reach before the ladder slips (kaboom)? The acceleration of gravity
is 9.8 m/s^2 .
Answer in units of m.